The Practice of Interpretive Journalism in the Twentieth Century Got

The practice of interpretive journalism in the twentieth century got its first significant boost from _.

A) print journalism, which then passed the practice along to radio
B) radio broadcasters who started developing commentary as part of their news in the
C) the introduction of television
D) a push for probing analysis in print journalism in the 1920s and 1930s
E) None of the above options is correct.